Microsoft has partnered with Anthropic to develop an official C# SDK for the Model Context Protocol (MCP), an open protocol designed to connect large language models (LLMs) with external tools and data sources. The SDK is open-source and available under the modelcontextprotocol GitHub organization.
The C# SDK is based on an existing community project called mcpdotnet, originally started by Peder Holdgaard Pederson. Microsoft acknowledged the groundwork laid by Pederson and other contributors, which helped shape the foundation for this release. David Fowler, a distinguished engineer at Microsoft, noted:
Most of the credit goes to Peder Holdgaard Pedersen who we teamed up with after he built a great implementation!
Initially introduced by Anthropic in late…